Liquefied natural gas (LNG) ship pump tower sliding block mounting tool and using method

Abstract

The embodiment of the invention provides an LNG ship pump tower sliding block mounting tool and a using method, and belongs to the technical field of ship self-building. The mounting tool comprises a bearing plate and a connecting rod, the bearing plate is provided with a bearing face used for bearing the oil cylinder, one end of the connecting rod is connected with the bearing plate, and the other end of the connecting rod extends along the side deviating from the bearing face. According to the LNG ship pump tower sliding block installation tool, deformation caused by the fact that an insulating layer is pressed in the pump tower sliding block installation period can be greatly avoided, and the risk that the insulating layer is pressed and damaged is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of ship self-construction, and in particular to an installation tool for a slider of an LNG ship pump tower and a method for using the tool. Background Art

[0002] The pump tower is an important part of the liquid cargo tank of the LNG ship. The pump tower is the passage for liquid cargo to enter and exit the cargo tank. The pump tower is made of stainless steel. When the current LNG transport ship is loaded with low-temperature liquid cargo, the length of the pump tower will be shortened by nearly 80mm. Because the pump tower will shrink under low-temperature conditions, the pump tower does not touch the bottom surface of the liquid cargo tank in the cargo hold, and the pump tower is suspended relative to the bottom surface of the liquid cargo tank. In order to prevent the pump tower from shaking violently during the voyage of the ship, a pump tower base is provided at the bottom of the liquid cargo tank to limit the installation position of the pump tower, and a slider installed between the pump tower guide device and the pump tower base is used to limit the movement range of the pump tower. However, the installation requirements for the slider are high, the clearance requirements are extremely small, and the processing surface of the slider is not completely smooth. Various factors increase the difficulty of installing the slider.

[0003] At present, an oil pump is needed to lift the slider during installation. The oil pump is placed on the bottom of the cargo tank and lifts the slider to the target position of the pump tower. However, the pressure generated by the oil pump lifting the slider directly acts on the insulation layer on the bottom of the cargo tank, resulting in the risk of deformation of the insulation layer after being compressed. Moreover, this area is located directly below the pump tower. If the insulation layer is deformed and needs to be repaired, there will be a problem of narrow construction space and extremely high construction difficulty. Summary of the invention

[0004] The embodiment of the present application provides an LNG ship pump tower slider installation tool and a use method, which can significantly avoid the deformation of the insulation layer caused by pressure during the installation of the pump tower slider, and reduce the risk of pressure damage to the insulation layer.

[0005] In the first aspect, an embodiment of the present application provides an LNG ship pump tower slider installation tool, the installation tool includes a bearing plate and a connecting rod, the bearing plate has a bearing surface for supporting the oil cylinder, one end of the connecting rod is connected to the bearing plate, and the other end is extended along a side away from the bearing surface.

[0006] In this solution, through the setting of the installation tooling, after the installation tooling is connected and fixed to the pump tower bottom plate through the connecting rod, the installation tooling is suspended and installed on the pump tower bottom plate. The bearing plate of the installation tooling can provide a placement and force-bearing function for the oil pump. Compared with the prior art where the oil pump is placed on the insulation layer of the liquid cargo tank, the bearing plate replaces the function of the insulation layer in the prior art to provide an installation surface for the oil pump during the installation of the slider. After the oil pump is placed on the bearing plate, the oil pump does not contact the insulation layer of the liquid cargo tank. During the process of the oil pump lifting the slider to the target position of the pump tower, the reaction force of the oil pump acts on the bearing plate and is directly transmitted back to the pump tower bottom plate through the connecting rod again. In this way, the pressure of the oil pump will not act on the insulation layer of the liquid cargo tank, which can greatly avoid the phenomenon of deformation of the insulation layer under pressure during the installation of the slider of the pump tower and reduce the risk of damage to the insulation layer under pressure.

[0007] In some embodiments, both the bearing plate and the connecting rod are metal parts.

[0008] In the above technical solution, both the bearing plate and the connecting rod are made of metal parts. The metal parts have high structural strength, and it is convenient to connect between the connecting rod and the bearing plate of the metal parts, and they can be fixed by welding. And the connecting rod of the metal parts is also convenient to be welded to the pump tower bottom plate, with convenient and reliable connection and high structural strength.

[0009] In some embodiments, the number of connecting rods is multiple, and the multiple connecting rods are distributed at intervals on the periphery of the bearing plate.

[0010] In the above technical solution, through the setting of multiple connecting rods, the connecting rods play a role in connecting the bearing plate and the pump tower bottom plate. The multiple connecting rods can improve the connection strength between the installation tooling and the pump tower bottom plate, and during the process of the oil pump installing the slider, the multiple connecting rods can play a role in dispersing the force transmission, so that the reaction force borne by the bearing plate is evenly transmitted to the pump tower bottom plate through the multiple connecting rods, improving the installation stability and force transmission uniformity of the installation tooling.

[0011] In some embodiments, the number of connecting rods is two, and the two connecting rods are distributed on both sides of the length direction of the bearing plate.

[0012] In the above technical solution, considering that the installation tooling needs to be disassembled again after the slider is installed, it is necessary to be compatible with the installation reliability and disassembly difficulty of the installation tooling. By setting the number of connecting rods to two, the installation tooling can be stably connected and fixed to the pump tower bottom plate, and when disassembling the installation tooling subsequently, only the two connecting rods need to be disassembled and separated from the pump tower bottom plate, with little disassembly work, being relatively convenient and higher installation efficiency of the slider.

[0013] In some embodiments, through holes for the connecting rod to pass through are provided on the bearing plate. A nut is provided at one end of the connecting rod, and the size of the nut is larger than that of the through hole. The nut is located on the side opposite to the bearing surface of the bearing plate; the other end of the connecting rod is used to connect to the bottom plate of the pump tower.

[0014] In the above technical solution, in order to improve the connection strength between the connecting rod and the bearing plate, by providing through holes on the bearing plate, the size of the nut at the end of the connecting rod is larger than that of the through hole, and the nut is located on the side opposite to the bearing surface of the bearing plate. After the oil pump is placed on the bearing surface, the reaction force of the oil pump acts on the bearing plate, and the nut provides a blocking effect on the bearing plate to prevent the bearing plate from moving relative to the connecting rod, and the connection reliability between the connecting rod and the bearing plate is high. Moreover, the connecting rod can be detached from the bearing plate, and it is small in size, facilitating the storage and transfer of the installation tooling.

[0015] In some embodiments, the connecting rod is welded to the bearing plate.

[0016] In the above technical solution, on the premise that a nut is provided at one end of the connecting rod and the size of the nut is larger than that of the through hole, by welding the connecting rod to the bearing plate, the connection reliability between the bearing plate and the connecting rod is further improved, and the structural stability of the installation tooling is increased.

[0017] In some embodiments, the bearing plate has a first side and a second side in the width direction, and the distances from the through hole to the first side and the second side are equal.

[0018] In the above technical solution, making the distances from the through hole to the first side and the second side of the bearing plate equal is equivalent to setting the position of the through hole at the midline position in the width direction of the bearing plate. The connection point between the bearing plate and the connecting rod is located at the middle position of the bearing plate, and the connecting rod is more uniformly and reliably stressed, avoiding the phenomenon of local stress.

[0019] In some embodiments, along the length direction of the bearing plate, the bearing plate has a third side and a fourth side that are relatively distributed, and there is a spacing between the through hole and the third side or the fourth side.

[0020] In the above technical solution, having a spacing between the through hole and the third side or the fourth side makes the connecting rod located inside the bearing plate, and the structural stability of the connecting rod and the bearing plate is high.

[0021] In a second aspect, the embodiments of the present application further provide a method for using an LNG ship pump tower slider installation tooling. The method for using is based on the LNG ship pump tower slider installation tooling in the foregoing embodiments, and the method for using includes the following steps: welding the end of the connecting rod away from the bearing plate in the installation tooling to the bottom plate of the pump tower; placing the oil pump on the bearing plate, placing the slider at the output end of the oil pump, and slowly squeezing the oil pump to lift the slider to the target position of the pump tower to complete the installation of the slider; separating the installation tooling from the bottom plate of the pump tower, and repeating the above steps until all the sliders are installed on the pump tower.

[0022] In the above technical solution, after the installation tooling is fixedly connected to the pump tower bottom plate through the connecting rod, the installation tooling is suspended and installed below the pump tower bottom plate. The bearing plate provides a placement and load-bearing function for the oil pump. During the process of the oil pump pushing the slider to be installed at the target position of the pump tower, the reverse pressure of the oil pump acts on the bearing plate and is directly transmitted back to the pump tower bottom plate through the connecting rod. In this way, the pressure of the oil pump will not act on the insulation layer of the liquid cargo tank, and it is possible to greatly avoid the deformation of the insulation layer caused by pressure during the installation of the slider of the pump tower, reducing the risk of damage to the insulation layer due to pressure.

[0023] In some embodiments, when separating the installation tooling from the pump tower bottom plate, the weld between the connecting rod and the pump tower bottom plate is ground off, and the installation tooling is removed.

[0024] In the above technical solution, grinding off the weld between the connecting rod and the pump tower bottom plate is more convenient and faster for disassembling the installation tooling compared to applying force forcibly, such as separating the connecting rod from the pump tower bottom plate by hammering. Moreover, it causes less damage to the pump tower and is more time-saving and labor-saving for disassembly.

[0025] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0027] Figure 1 Structural schematic diagram of the LNG ship pump tower slider installation tooling provided by some embodiments of the present application;

[0028] Figure 2 For Figure 1 Structural schematic diagram of the bearing plate in the installation tooling;

[0029] Figure 3 Front view of the LNG ship pump tower slider installation tooling provided by some embodiments of the present application;

[0030] Figure 4 For Figure 3 Structural schematic diagram of the connecting rod;

[0031] Reference numerals: 100 - installation tooling; 10 - bearing plate; 11 - bearing surface; 12 - through hole; 13 - first side; 14 - second side; 15 - third side; 16 - fourth side; 20 - connecting rod; 21 - nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] Example

[0038] The present application embodiment provides a LNG ship pump tower slider installation tool, please refer to Figures 1 to 4 The installation tool 100 includes a bearing plate 10 and a connecting rod 20. The bearing plate 10 has a bearing surface 11 for bearing the oil cylinder. One end of the connecting rod 20 is connected to the bearing plate 10, and the other end is extended along a side away from the bearing surface 11.

[0039] In this solution, through the setting of the installation tooling 100, after the installation tooling 100 is connected and fixed to the pump tower bottom plate through the connecting rod 20, the installation tooling 100 is suspended and installed on the pump tower bottom plate. The bearing plate 10 of the installation tooling can provide a placement and load-bearing function for the oil pump. Compared with the prior art where the oil pump is placed on the insulation layer of the liquid cargo tank, the bearing plate 10 replaces the function of the insulation layer in the prior art to provide an installation surface for the oil pump during the installation process of the slider. After the oil pump is placed on the bearing plate 10, the oil pump does not contact the insulation layer of the liquid cargo tank. During the process of the oil pump lifting the slider to the target position of the pump tower, the reaction force of the oil pump acts on the bearing plate 10 and is directly transmitted back to the pump tower bottom plate through the connecting rod 20 in the reverse direction. In this way, the pressure of the oil pump will not act on the insulation layer of the liquid cargo tank, which can greatly avoid the phenomenon of deformation of the insulation layer caused by pressure during the installation of the slider of the pump tower and reduce the risk of damage to the insulation layer due to pressure.

[0040] It can be understood that the installation tooling 100 includes a bearing plate 10 and a connecting rod 20. The bearing surface 11 of the bearing plate 10 can be used for the oil pump to be placed on the bearing plate 10. The connecting rod 20 is arranged on the bearing plate 10. After the connecting rod 20 is welded to the pump tower bottom plate, the connecting rod 20 separates the bearing plate 10 from the pump tower bottom plate. An installation space for the oil pump to be placed and the slider to displace is formed between the bearing plate 10 and the pump tower bottom plate, which is conducive to the oil pump lifting and installing the slider to the target position of the pump tower.

[0041] The pump tower is an important functional component in the cargo tank area of an LNG ship and is mainly used for loading and unloading liquefied natural gas. The structure of the pump tower is in the shape of a tripod mast and is vertically suspended in each cargo tank. Liquefied natural gas is injected into the cargo tank through pipelines and output to the receiving station through the main pump pipe or the emergency pump pipe. The materials used for the pump tower are mainly cryogenic materials, and the working temperature is -163°C. Such materials have a large coefficient of linear expansion and are extremely prone to deformation after welding. Therefore, the manufacturing accuracy requirements are extremely high.

[0042] The pump tower plays an important role in an LNG ship, ensuring the smooth loading, unloading and transportation of liquefied natural gas. Due to its special cryogenic working environment, the design and manufacture of the pump tower require extremely high precision and technical level. The construction accuracy and quality of the pump tower directly affect the overall performance and safety of the LNG ship.

[0043] The pump tower is a tripod mast composed of an austenitic stainless steel pipe structure and is suspended and installed in the LNG liquid cargo tank. The top of the pump tower is connected to the liquid dome; at the bottom of the tank, a guiding mechanism, namely the pump tower base, is provided, which fixes and restricts the pump tower in the front-back and left-right directions and can freely slide in the height direction, enabling it to expand and contract thermally. At the same time, the base reduces the friction generated during the contraction of the pump tower and prevents damage to the relevant pipelines and equipment on the pump tower.

[0044] In some embodiments, both the carrier plate 10 and the connecting rod 20 are metal parts. By using metal parts for both the carrier plate 10 and the connecting rod 20, the structural strength of the metal parts is high, and it is convenient to connect between the connecting rod 20 and the carrier plate 10 of the metal parts, and welding can be used for fixing. Moreover, the connecting rod 20 of the metal parts is also convenient to be welded and fixed to the bottom plate of the pump tower, with convenient and reliable connection and high structural strength.

[0045] The sizes of the carrier plate 10 and the connecting rod 20 are correspondingly increased to withstand the pressure of the oil pump during the installation of the slider.

[0046] In some embodiments, the number of the connecting rods 20 is multiple, and the multiple connecting rods 20 are spaced apart and distributed on the circumferential side of the carrier plate 10. Through the arrangement of the multiple connecting rods 20, the connecting rods 20 play a role in connecting the carrier plate 10 and the bottom plate of the pump tower. The multiple connecting rods 20 can improve the connection strength between the installation tooling 100 and the bottom plate of the pump tower, and during the installation of the slider of the oil pump, the multiple connecting rods 20 can play a role in dispersing the force transmission, so that the reaction force borne by the carrier plate 10 is evenly transmitted to the bottom plate of the pump tower through the multiple connecting rods 20, improving the installation stability and the force transmission uniformity of the installation tooling 100.

[0047] The number of the connecting rods 20 can be two, three, four, etc. The specific number of the connecting rods 20 can be determined according to the actual situation.

[0048] In some embodiments, the number of the connecting rods 20 is two, and the two connecting rods 20 are distributed on both sides of the length direction of the carrier plate 10. Considering that the installation tooling 100 needs to be disassembled again after the installation of the slider is completed, it is necessary to balance the installation reliability and the disassembly difficulty of the installation tooling 100. By setting the number of the connecting rods 20 to two, the installation tooling 100 can be stably connected and fixed to the bottom plate of the pump tower, and when the installation tooling 100 is disassembled later, only the two connecting rods 20 need to be disassembled and separated from the bottom plate of the pump tower, with a small amount of disassembly work and being relatively convenient, and the installation efficiency of the slider is higher.

[0049] In some embodiments, a through hole 12 for the connecting rod 20 to pass through is provided on the bearing plate 10. A nut 21 is provided at one end of the connecting rod 20. The size of the nut 21 is larger than that of the through hole 12, and the nut 21 is located on the side opposite to the bearing surface 11 of the bearing plate 10. The other end of the connecting rod 20 is used to connect to the bottom plate of the pump tower. In order to improve the connection strength between the connecting rod 20 and the bearing plate 10, by providing a through hole 12 on the bearing plate 10, the size of the nut 21 at the end of the connecting rod 20 is larger than that of the through hole 12, and the nut 21 is located on the side opposite to the bearing surface 11 of the bearing plate 10. After the oil pump is placed on the bearing surface 11, the reaction force of the oil pump acts on the bearing plate 10, and the nut 21 provides a blocking effect on the bearing plate 10 to prevent the bearing plate 10 from moving relative to the connecting rod 20, and the connection reliability between the connecting rod 20 and the bearing plate 10 is high. Moreover, the connecting rod 20 can be detached from the bearing plate 10, and it has a small size, which is convenient for the storage and transfer of the installation tooling.

[0050] In some embodiments, the connecting rod 20 is welded to the bearing plate 10. On the premise that a nut 21 is provided at one end of the connecting rod 20 and the size of the nut 21 is larger than that of the through hole 12, by welding the connecting rod 20 to the bearing plate 10, the connection reliability between the bearing plate 10 and the connecting rod 20 is further improved, and the structural stability of the installation tooling 100 is increased.

[0051] In some embodiments, please refer to Figure 2 , the bearing plate 10 has a first side 13 and a second side 14 in the width direction, and the through hole 12 is equidistant from the first side 13 and the second side 14. Making the through hole 12 equidistant from the first side 13 and the second side 14 of the bearing plate 10 is equivalent to setting the position of the through hole 12 at the midline position of the bearing plate 10 in the width direction. The connection point between the bearing plate 10 and the connecting rod 20 is located at the middle position of the bearing plate 10, and the connecting rod 20 is more uniformly and reliably stressed, avoiding the phenomenon of local stress.

[0052] In some embodiments, please refer to Figure 2 , along the length direction of the bearing plate 10, the bearing plate 10 has a third side 15 and a fourth side 16 distributed oppositely, and the through hole 12 has a spacing from the third side 15 or the fourth side 16. Making the through hole 12 have a spacing from the third side 15 or the fourth side 16, in this way, the connecting rod 20 is located inside the bearing plate 10, and the structural stability between the connecting rod 20 and the bearing plate 10 is high.

[0053] The embodiment of the present application also provides a method for using an installation tool for LNG ship pump tower sliders. The method for using is based on the installation tool 100 for LNG ship pump tower sliders in the foregoing embodiment, and the method for using includes the following steps: Weld the end of the connecting rod 20 in the installation tool 100 away from the bearing plate 10 to the pump tower bottom plate; Place the oil pump on the bearing plate 10, place the slider on the output end of the oil pump, and slowly squeeze the oil pump to lift the slider to the target position of the pump tower to complete the installation of the slider; Separate the installation tool 100 from the pump tower bottom plate, and repeat the above steps until all the sliders are installed on the pump tower. After the installation tool 100 is connected and fixed to the pump tower bottom plate through the connecting rod 20, the installation tool 100 is suspended and installed below the pump tower bottom plate. The bearing plate 10 provides a placement and force-bearing function for the oil pump. During the process of the oil pump pushing the slider to be installed to the target position of the pump tower, the reaction force of the oil pump acts on the bearing plate 10 and is directly transmitted to the pump tower bottom plate in the reverse direction through the connecting rod 20. In this way, the pressure of the oil pump will not act on the insulation layer of the liquid cargo tank, which can greatly avoid the deformation of the insulation layer caused by pressure during the installation of the sliders of the pump tower and reduce the risk of damage to the insulation layer caused by pressure.

[0054] In some embodiments, when separating the installation tool 100 from the pump tower bottom plate, grind off the weld between the connecting rod 20 and the pump tower bottom plate, and remove the installation tool 100. Grinding off the weld between the connecting rod 20 and the pump tower bottom plate is more convenient and faster for disassembling the installation tool 100 compared to applying force forcibly, such as separating the connecting rod 20 from the pump tower bottom plate by hammering, and causes less damage to the pump tower, and is more time-saving and labor-saving for disassembly.

[0055] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0056] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An LNG ship pump tower slider installation tool, characterized in that: It comprises a bearing plate and a connecting rod, wherein the bearing plate has a bearing surface for bearing the oil cylinder, one end of the connecting rod is connected to the bearing plate, and the other end is extended along a side away from the bearing surface.

2. The LNG ship pump tower slider installation tool according to claim 1 is characterized in that: The bearing plate and the connecting rod are both metal parts.

3. The LNG ship pump tower slider installation tool according to claim 1 is characterized in that: There are multiple connecting rods, and the multiple connecting rods are distributed at intervals around the bearing plate.

4. The LNG ship pump tower slider installation tool according to claim 1, characterized in that: The number of the connecting rods is two, and the two connecting rods are distributed on both sides of the bearing plate in the length direction.

5. The LNG ship pump tower slider installation tool according to claim 4 is characterized in that: The supporting plate is provided with a through hole for the connecting rod to pass through, and one end of the connecting rod is provided with a nut, the size of the nut is larger than the size of the through hole, and the nut is located on the side of the supporting plate opposite to the supporting surface; the other end of the connecting rod is used to connect with the bottom plate of the pump tower.

6. The LNG ship pump tower slider installation tool according to claim 5, characterized in that: The connecting rod is welded to the bearing plate.

7. The LNG ship pump tower slider installation tool according to claim 5, characterized in that: The carrying plate has a first side and a second side in a width direction, and the through hole is equidistant from the first side and the second side.

8. The LNG ship pump tower slider installation tool according to claim 7, characterized in that: Along the length direction of the carrying plate, the carrying plate has a third side and a fourth side that are relatively distributed, and the through hole is spaced apart from the third side or the fourth side.

9. A method for using an LNG ship pump tower slider installation tool, based on the LNG ship pump tower slider installation tool according to any one of claims 1 to 8, characterized in that: The following steps are involved: Weld the end of the connecting rod in the installation tooling away from the bearing plate to the bottom plate of the pump tower; Place the oil pump on the carrying plate, place the slider on the output end of the oil pump, slowly squeeze the oil pump to lift the slider to the target position of the pump tower, and complete the installation of the slider; Separating the installation tool from the pump tower bottom plate; Repeat the above steps until all sliders are installed on the pump tower.

10. The method for using the LNG ship pump tower slider installation tool according to claim 9, characterized in that: When the installation tool is separated from the pump tower bottom plate, the weld between the connecting rod and the pump tower bottom plate is ground off and the installation tool is removed.

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